#!/usr/bin/env python
# -*- coding:utf-8 -*-
import numpy as np
import matplotlib.pyplot as plt

x = np.arange(0, 6, 0.1)
y1 = np.sin(x)
y2 = np.cos(x)

plt.plot(x, y1, label="sin")
plt.plot(x, y2, label="cos", linestyle = "--")
plt.xlabel("x")
plt.ylabel("y")
plt.title('sin && cos')
plt.legend()
plt.show()
